Most Helpful Girl

The reason why people date is so they can weed out who they like the most from that bunch.

Give him a shot.

If you two end up exclusively dating each other and he is still seeing other girls, then it's a problem.

Right now he isn't committed to you or them, so he can see who he pleases.

Also, to answer your question you should know after the first date if you two mesh well together or not. After that it can take a few more dates or many more, to become official (there is no set time).

One guy I saw I guess really liked me, but had a parade of girls coming though his room (found out from his roommate). Another one has seen a couple people over the past couple months, but isn't a total slut as far as I know lol. It seems that the ones that have jobs that they are busy with have less time to get into trouble, but that's just my personal experience. It sucks, but its just so hard to tell so often.